Pre-construction

Initial Setup

Phase 1

Pre- tender

Phase 2

Design

Secondary Setup

Phase 3

Pre- construction

Phase 4

Asset/ Opperations Management

Phase 5

Implementation

During the pre-construction phase, 3D and 4D modeling techniques can be used to simulate the construction process through a BIM model and detect operation succession errors and space use conflicts

The pre-construction phase was broadly classified into three phases:

1. Developing BIM models: Developing Architectural, Structural, and MEPF BIM models from the designs created by the architects and engineers. This phase commenced with the development of an Architectural model based on architect’s design. Structural model was created from structural engineers’ design. These two models were copied to the MEPF plan and served as a reference for creating MEPF models with design inputs from HVAC, Electrical, Plumbing, and Fire Fighting designers.

2. Clash Detection and BIM Coordination: Performing interdisciplinary interference check and clash resolution to generate coordinated architectural, structural, and MEPF models. Since architectural and structural models were developed before routing the MEP Services it helped in reducing clashes. The remaining clashes were detected and resolved in close coordination with all the relevant design teams.

3. Extracting 2D Drawings: Extracting Architectural Construction Drawings and MEPF Shop Drawings from the coordinated models. During the final phase, 2D drawings were extracted from the final models. These drawings were directly used on-site for the purpose of construction.

The use of BIM in the pre-construction process enhanced the construction speed while minimizing the costs. This approach was more environment-friendly as on-site re-work and subsequent wastage of materials was reduced.

Benefits of BIM during the pre-construction

In pre-construction, BIM can serve as a tool to facilitate straightforward operation in all phases of the project, including construction management, pre-construction planning, and post-construction management to empower the facilities management function.

The 3D BIM Model has helped to resolve issues, for example, BIM Coordination Services and Constructability to eliminate additional costs or rework that result in a delay.

BIM can enhance communication and visualization in the pre-construction period. BIM can improve cost estimation, scheduling of construction management, design and planning optimization, construction and fabrication, quality control, waste and time management.